25R SAMSUNG INR18650-25R 2500mAh - 20A LI-ION BATTERY CELL FLAT TOP UNPROTECTED LITHIUM Rechargeable
Genuine Samsung INR18650-25R M 2500mAh - 20A Rechargeable Li-ion
20A max continues discharge
100A max for 1 second
50A max for 5 seconds
This battery weights 43-44 gr (1+5/8 oz) it is a Genuine Samsung. ( Another 18650 cell UNBRANDED I have weights 26 gr! (7/8 oz)).Samsung INR18650-25R is one of the best choices.
I include an article from 'instructables" about fake 18650 batteries
[...An average genuine 18650 batteries will weigh about 45g and no
nothing less than 42g. You can see I have a fake 18650 battery in the
pic weigh 32g only and the genuine 18650 battery weight 45g. Some
genuine 18650 battery can weigh more than 50g. Good brands will tell you
the weight of the battery.You can use a digital kitchen scale. Why fake 18650 battery weigh less? That
is because inside is a smaller battery with step up circuit which wrap
in layers of paper and stuffed inside a 18650 battery size case then
heat shrink in a tight plastic label sheet to make it look real....]
It is very suitable for vaping for DIY e-bike battery and any other use where 18650 cell is used.
Vaping and e-bike need high drain batteries and
charge at 4,2V 1A CC CV (4A max)
This battery is NOT protected.
-Do not charge over 4.2V!
-Do not change polarity!
-Do not heat the battery, or store under the influence of high temperatures!
-Do never shortcut!
-Make sure they do not come in contact with water!
- For longer storage periods should be stored below 45 ° C temperature.
- After long storage times need the cell probably make a few charge cycles to increase capacity again.
-Do not discharge below 3V.
WARNING this battery if not used in an compatible device or charger can be DANGEROUS.
This is a high drain battery. It has the ability to discharge pulse current up to 100A.
Never put it in your pocket or other places with keys or other metallic objects.
This battery is unprotected Lithium chemistry high drain .
Must be charged only by suitable chargers.
Precaution must be cared not to overheat.
If overheated during charge or discharge disconnect and wait to cool.
Never charge the batteries unattended.
If stored for long time must be half charged. (3.5V)
All batteries come half-charged. Full charge before use. Full capacity will come after some charges and discharges.